Geoscience Reference
In-Depth Information
HYP1 = uint8(HYP1);
HYP2 = uint8(HYP2);
HYP3 = uint8(HYP3);
Again, displaying the radiance values of the three bands in a histogram using
subplot(1,3,1), histogram(single(HYP1(:)),30), title('Band 29')
subplot(1,3,2), histogram(single(HYP2(:)),30), title('Band 23')
subplot(1,3,3), histogram(single(HYP3(:)),30), title('Band 16')
reveals that most radiance values are actually within the range [20,80].
Instead of using histogram we can also use imhist to display the uint8 data.
subplot(1,3,1), imhist(HYP1(:)), title('Band 29')
subplot(1,3,2), imhist(HYP2(:)), title('Band 23')
subplot(1,3,3), imhist(HYP3(:)), title('Band 16')
We then use histeq to enhance the contrast in the image and concatenate the
three bands to a 3,189-by-242-by-3 array.
HYP1 = histeq(HYP1);
HYP2 = histeq(HYP2);
HYP3 = histeq(HYP3);
subplot(1,3,1), imhist(HYP1(:)), title('Band 29')
subplot(1,3,2), imhist(HYP2(:)), title('Band 23')
subplot(1,3,3), imhist(HYP3(:)), title('Band 16')
HYPC = cat(3,HYP1,HYP2,HYP3);
Fig. 8.5 RGB composite of an EO-1 Hyperion image using VNIR bands 29, 23 and 16, showing
the Barrier Volcanic Complex in the Suguta Valley of the Northern Kenya Rit . h e image was
acquired on 16th July 2013. Original image courtesy of NASA EO-1 Mission.
Search WWH ::




Custom Search